Asbestos is a highly hazardous substance that has been used in building materials for many years. It's highly carcinogenic and can cause a wide range of health problems, including lung cancer and mesothelioma. The use of asbestos was banned in the UK in 1999, but many buildings still contain this dangerous substance. If you're renovating or demolishing an old building, it's important to get rid of any asbestos safely to prevent any harm to your health.